Radio and sound reproducing and recording device



Sept. 1, 1931. Dye. COHEN- 1,821,496

RADQIO AND SOUND REPRODUQING AND RECORDING mmca Filed Feb. 18, 1931 Jaw/id g'c'w ZTTORNEY combined orchestral is also possible to listen Reference is to view illustrating the circuit Patented Sept. 1, 1931 2 DAVID e. coHEiI, or BROOKLYN, NEW YORK RADIO AND sounn marnonucme AND RECORDING nnvrcn Application flied February 18, 1981. Serial uo..51e,557.

This invention relates to a radio and sound reproducing device adapted for use in combination with means forproducing phonographic records. The object of this invention is to provide a combination of reproducing and recording means whereby a radio program received by a radio receiver may be combined with local sound transmittedthrough a microphone and reproduced through a loud speaker and recorded on a phonograph record. In other words, if we assume that the radio receiver, to which my invention is applied, is tuned in to and is receiving, say, for instance, an orchestral number, I can, through'the medium of my invention, introduce a vocal accompaniment to the orchestral sound, whereby the resultant sound issuing from the loud speaker will be in the nature of a and vocal number.

It is also possible, through the medium of my invention, to make a phonographic record or record a program, consisting of both local sound and radio broadcast matter. I It to the reproduction of such a program simultaneously with the making of aphonographic recordthereof. These and other results are readily attain-' able through the use of my invention.

be had to the accompanying drawing, forming a part. hereof, in which-the figure shown is a diagrammatic employed in carrying out my invention.

In the circuit disclosed in the accompany ing drawing, 1 diagrammatically indicates a conventional type of radio receiving'set, the output of which is connected to an audio frequency amplifier 2. A switch 5 is interposed between the output of the radio rc-. ceiving set and the in ut of the audio frequency amplifier 2. aid switch is provided with a fixed contact C1 and a movable contact lever S1. It will be obvious that when the movable switch lever S1 is in contact with the fixed member C1, the circuit between the radio'receiving set 1 and the audio frequency amplifier 2 will be closed. At 3 is indicated a loud speaker, which is connected to the output of the audio frequency amplifier by means of a switch 6 having a movable arm S3.

fixed contact C2 and a Thus, when the switch arm, S1 is connected to the fixed contact C1, and when the movable switch arm S3 is in as contact with the fixed member C2, signals received by the radio set 1 q and amplified by the audio frequency amplifier 2 will be heard through the At M is shown loud speaker 3. a microphone which is adapted to be connected tothe input C1 of the audio frequency amplifier 2, the microphone M being provided with a switch arm S2 to effect such a connection. It will be clear that when the switch arm S2 is con- 66 nected to the fixedcontact C1, sound transmitted by the microphone M will be amplithe audio frequency amplifier 2 and such amplified sounds will issue from the loud speaker 3. If the in contact with th switch arm S1 is 70 e fixed contact member C1 and the switch arm S2 is also in contact with Cl, it will then be apparent that both broadcast sound received by the radio receiving set 1 and local sound transmitted by the microphone audio frequency amplifier broadcast program emanate together f will be amplified by the 2 and the radio and the local sound will rom the loud speaker 3.

At CS is shown a phonograph record recording device which operates upon a record held upon the usual turn-table T. The rea.

cording device GS arm S4, which is is connected to a switch adapted to close circuit with the switch point C2.

From the foregoing,

the manner in which my improved radio and sound-reproducing and recording device is used, will'be readily understood. If we to have a vocal radio broadcast of readily done by bringing assume that it is desired arrangement accompany a 9.

a violin solo this can be the movable switch members S1 and S2 both in contact with the fixed member C1, and also by bringing theswitch arm S3 in contact with the switch 9 member C2. Thus,

when a broadcast pmgram is being recei intothe microphone the loud speaker 3' will be in nating from ved,-a vocalist may sing M and the sound emathe nature of a combined violin and vocal selection. The volume of the radio broadcast accompaniment may be controlled by a volume control located in the radio receiving set so that such accompaniment may be subdued or pronounced according to the desires of the listener. To further the effect, another loud speaker can be connected to the output of the audio frequency amplifier, such loud speaker preferably being located at adistance or in a room other than that in which the singer and apparatus are located. y

When it is desired to make a phonograph recordoj a dual program of the character just mentioned, this can be easily arranged freguency amplifier, the program as reco ed will be simultaneously reproduced by the loud speaker. n: It will be clear that from the arrangement disclosed, very many novel and interesting results can be obtained. By the connection *of a microphone inthe manner indicated,

it is possible to interpose extraneous local sounds into the received radio program so that the final amplified resultant sound em anating from the speaker Will consist in the combination of a radio broadcast program and a locally transmitted sound. By suit- ;able volumecontrols, the volume of both or either the radio broadcast program and the localsounds may be made more pronounced or retarded, so that the reproduced sound will be'adapted to the ears of the listener.

' Through the connection of a record-producing device in the manner disclosed, it is possible to roduce a phonograph record composed o llocal sound combined with radio roadcast selections.

a I am aware that efi'orts have been made in the past to combine a radio-received program with sound received from a reproduced phonograph record. This has been found impractical due to the inability of the operator to properly synchronize the speed of the record being ,reproduced with the radio program being received and for many other reasons. The human element necessary to enable one of the sounds-trans- 4 mitted to adapt itself to the other-and harmoniously merge therewith so that the re-' sultant combination of sounds emanating from the loudspeaker will be in time and entirely harmonious, was absent. With my invention, the local sound transmitted by the microphone may be readily adapted to the type of program being received via radio, so that the resultant production will be entirely harmonious and in perfect rhythm.

It is also possible with the apparatus forming the subject matter of my invention,

to reproduce sound from a phonograph recrd simultaneously with sound transmitted by a microphone. To do this, I utilize a phonograph pickup 10, which 'operates on a phonograph record 11, and said pick-up is connected to a switch-arm 12, which is adapted when required to be electrically connected to the input C1 of the audio frequency amplifier. Thus, when the switch arm 12 and the switch-arm S2 are both .connected to C1, it will be apparent that the sound from the record 11 and sound transmitted from the microphone M will be simultaneously reproduced through the speaker 3. In case it is desired to record such sounds the recording device CS is conswitch arm S4 incontact with C2.

What I claim is 2-- 1. A device of the class described consisting of means for receiving radio broadnected into the circuit by bringing the cast sounds, an audio amplifier connected to said radio receiving means, a microphone also connected to said amplifier, and a recording device and a loudspeaker connected to the output of the amplifier.

2. A device of the class described comprising means for receiving radio broadcast sounds, an audio frequency, amplifier, a microphone, means for connecting said radio p,

receiving means and the microphone or both to the input of the amplifier, a loud speaker and a recording device and means for connecting said loudspeaker or recording device or both to the output of the audio amplifier.

3.-An apparatus of the class described comprising an audio frequency amplifier, a

loudspeaker .and a recording device simultaneously connected to the output thereof,

and a mlcrophone and a phonograph recordreproducing device connected simultaneously to the input of said amplifier.

Signed at the city, county and State of New York, this 17th day of F ebruary, 1931. DAVID G. COHEN. 

